I believe it is almost impossible to have an intermittent thermal fuse due to their very clever design. Although over age they can open up. Once open, however I do not believe they can connect again. The fuse is simply to metallic contacts that are force to be in contact during assembly. Their normal desired resting state would be to be not connected. When closed, the fuse cavity is filled with wax, which mostly determines when the fuse opens (temperature). With too much current through the fuse, the wax heats allowing the contact to spring apart to their normal resting position. Now, with no more current flowing, the wax hardens almost immediately, never allowing the two contacts to meet again. - Mike
Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dr Bruce Griffiths Sent: Sunday, July 22, 2007 9:39 PM To: Magnus Danielson; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 5370B low frequency modulation ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Hej Magnus Could there perhaps be an intermittent thermal fuse in the 10811? Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.